TCP: Red 1000K A15
The verdict
A red LED A15 bulb. It makes no real white light, so color rendering scores do not apply. Its body-clock signal is very low (melanopic DER 0.003).
For night use only: it gives off almost none of the light that keeps you alert, but everything looks red under it.
How true do colors look?Not applicable
No white light to judge
How do reds look?Not applicable
Not applicable
What color is the light?Red light
628K
Sold as 1000K.
How strong is its body-clock signal?Very low
Under 1% of daylight
Melanopic DER 0.003. Low is easier on sleep at night; high helps you feel alert by day.
The light
Measured spectrum, 380 to 780 nm, scaled to its peak.
Spectrum
Light color628K
Melanopic DER0.003Body-clock stimulus per lumen. Daylight is 1.0, a candle about 0.2.
Similar bulbs
Still sold, near the same color temperature.
Specs
Power, brightness and efficacy marked "rated" are the manufacturer's numbers. I have not measured them yet.
- Brand
- TCP
- Model
- Red
- Type
- LED
- Shape
- A15
- Base
- E26
- Finish
- Plastic
- Power (rated)
- 5W
- Dimmable
- No
- Sold as
- 1000K
- Measured
- 628K
- Tested
- Mar 1, 2023
- Instrument
- Handheld spectrometer (before the integrating sphere)
- Status
- Available